Fire Pistons

A piston achieves combustion by compressing air. The battery turns the crank, the plunger is pulled up and out of a hollow tube, sucks in some gasoline and air, then is shoved back, then compression makes the air very hot very quickly, and before the heat has a chance to be transferred into the surrounding material, the gas combusts, and the engine harnesses that power source, and the starter battery kicks back as the power flow from the alternator reverses, charging it, and of course, you can make it to dance rehearsal.
But did you know you can walk around with a piston in your pants? Achieving sudden heat by compressing air in a handheld piston is a great way to cause material to combust, which means you can start a fire without matches or even using the friction technique you have to perform flawlessly to become an Eagle Scout.
This kind of heating, from compression, is called adiabatic (Greek roots: a “not” dia “through” bat “to pass” – probably butchered that), which is an isothermal process where heat results from the inability for it to escape.
Katabatic (downhill, Foehn) winds heating up as they are forced downhill by being in a current that has flowed over a mountain is abiabatic as well. The air heats up because it is compressed under the added weight of more air above it as it goes downhill.
With a fire piston, you place some char-cloth (make it by “baking” torn jeans in a airtight container over fire – an altoids container would work perfect) onto the end of a stem that gets shoved into a piston. When you pull it back out, the material is on fire.

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